Teeth bleaching will not change any of these restorationís intrinsic (inside) color, however, it may slightly remove some extrinsic (outside) stains. The procedure will not harm dental restorations. If oneís natural teeth are yellower than the restored teeth, then whitening may bring the natural teeth closer in shade to the restored teeth. If the restored teeth are yellower in color, then bleaching will only make the difference in shade greater between them and their naturally colored counterparts. In this case, one may want to bleach their teeth first, then have the restorations redone by their dentist to match the newly bleached color. This, however, can lead to expensive and extensive dental work, so again, consult a dentist first.